Impeller



FIG. 1 is a perspective view of an impeller embodying my new design;

FIG. 2 is a top plan view of the impeller of FIG. 1;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right elevational view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken lines in FIGS. 1 and 3-7 are included for the purpose of illustrating components of the impeller that form no part of the claimed design. 

The ornamental design for impeller, as shown and described. 